Question

我正在使用此代码跟踪我服务中的电池信息：

    Intent i = new ContextWrapper(applicationContext).registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
     // now you can get the level and scale from this intent variable
    int level = i.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
    int scale = i.getIntExtra(BatteryManager.EXTRA_SCALE, -1);

float battPct = level/(float)scale;

1.我想知道它是否会自动更改，然后更换电池？或者我是否需要定期自己解雇这个意图？ 2.此外，我想知道是否有办法计算自使用1％剩余电池后经过的时间。

Answer 1

获取更改价值的更好方法是使用BroadcastReceiver。

更换电池时更改值。您需要使用BroadCastReceiver。

IntentFilter batteryLevelFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
registerReceiver(batteryLevelReceiver, batteryLevelFilter);

BroadcastReceiver batteryLevelReceiver = new BroadcastReceiver(){
    @Override
    public void onReceive(Context context, Intent intent){
        int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
        int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
        float battPct = level/(float)scale;       
    }
};

ACTION_BATTERY_CHANGED意图服务

1 个答案: